scsi_transport_fc.c 118 KB
Newer Older
1
/*
Linus Torvalds's avatar
Linus Torvalds committed
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
 *  FiberChannel transport specific attributes exported to sysfs.
 *
 *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  ========
 *
22
 *  Copyright (C) 2004-2007   James Smart, Emulex Corporation
Linus Torvalds's avatar
Linus Torvalds committed
23 24
 *    Rewrite for host, target, device, and remote port attributes,
 *    statistics, and service functions...
25
 *    Add vports, etc
Linus Torvalds's avatar
Linus Torvalds committed
26 27 28 29
 *
 */
#include <linux/module.h>
#include <linux/init.h>
30
#include <linux/slab.h>
31
#include <linux/delay.h>
Linus Torvalds's avatar
Linus Torvalds committed
32 33 34 35
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_fc.h>
36
#include <scsi/scsi_cmnd.h>
37 38 39
#include <linux/netlink.h>
#include <net/netlink.h>
#include <scsi/scsi_netlink_fc.h>
James Smart's avatar
James Smart committed
40
#include <scsi/scsi_bsg_fc.h>
Linus Torvalds's avatar
Linus Torvalds committed
41
#include "scsi_priv.h"
42
#include "scsi_transport_fc_internal.h"
Linus Torvalds's avatar
Linus Torvalds committed
43

44
static int fc_queue_work(struct Scsi_Host *, struct work_struct *);
45
static void fc_vport_sched_delete(struct work_struct *work);
46
static int fc_vport_setup(struct Scsi_Host *shost, int channel,
47 48
	struct device *pdev, struct fc_vport_identifiers  *ids,
	struct fc_vport **vport);
James Smart's avatar
James Smart committed
49 50 51 52
static int fc_bsg_hostadd(struct Scsi_Host *, struct fc_host_attrs *);
static int fc_bsg_rportadd(struct Scsi_Host *, struct fc_rport *);
static void fc_bsg_remove(struct request_queue *);
static void fc_bsg_goose_queue(struct fc_rport *);
53

Linus Torvalds's avatar
Linus Torvalds committed
54 55 56 57
/*
 * Redefine so that we can have same named attributes in the
 * sdev/starget/host objects.
 */
58 59
#define FC_DEVICE_ATTR(_prefix,_name,_mode,_show,_store)		\
struct device_attribute device_attr_##_prefix##_##_name = 	\
Linus Torvalds's avatar
Linus Torvalds committed
60 61 62 63 64 65 66 67
	__ATTR(_name,_mode,_show,_store)

#define fc_enum_name_search(title, table_type, table)			\
static const char *get_fc_##title##_name(enum table_type table_key)	\
{									\
	int i;								\
	char *name = NULL;						\
									\
68
	for (i = 0; i < ARRAY_SIZE(table); i++) {			\
Linus Torvalds's avatar
Linus Torvalds committed
69 70 71 72 73 74 75 76 77 78 79 80 81 82
		if (table[i].value == table_key) {			\
			name = table[i].name;				\
			break;						\
		}							\
	}								\
	return name;							\
}

#define fc_enum_name_match(title, table_type, table)			\
static int get_fc_##title##_match(const char *table_key,		\
		enum table_type *value)					\
{									\
	int i;								\
									\
83
	for (i = 0; i < ARRAY_SIZE(table); i++) {			\
Linus Torvalds's avatar
Linus Torvalds committed
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
		if (strncmp(table_key, table[i].name,			\
				table[i].matchlen) == 0) {		\
			*value = table[i].value;			\
			return 0; /* success */				\
		}							\
	}								\
	return 1; /* failure */						\
}


/* Convert fc_port_type values to ascii string name */
static struct {
	enum fc_port_type	value;
	char			*name;
} fc_port_type_names[] = {
	{ FC_PORTTYPE_UNKNOWN,		"Unknown" },
	{ FC_PORTTYPE_OTHER,		"Other" },
	{ FC_PORTTYPE_NOTPRESENT,	"Not Present" },
	{ FC_PORTTYPE_NPORT,	"NPort (fabric via point-to-point)" },
	{ FC_PORTTYPE_NLPORT,	"NLPort (fabric via loop)" },
	{ FC_PORTTYPE_LPORT,	"LPort (private loop)" },
105
	{ FC_PORTTYPE_PTP,	"Point-To-Point (direct nport connection)" },
106
	{ FC_PORTTYPE_NPIV,		"NPIV VPORT" },
Linus Torvalds's avatar
Linus Torvalds committed
107 108 109 110
};
fc_enum_name_search(port_type, fc_port_type, fc_port_type_names)
#define FC_PORTTYPE_MAX_NAMELEN		50

111 112 113
/* Reuse fc_port_type enum function for vport_type */
#define get_fc_vport_type_name get_fc_port_type_name

Linus Torvalds's avatar
Linus Torvalds committed
114

115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137
/* Convert fc_host_event_code values to ascii string name */
static const struct {
	enum fc_host_event_code		value;
	char				*name;
} fc_host_event_code_names[] = {
	{ FCH_EVT_LIP,			"lip" },
	{ FCH_EVT_LINKUP,		"link_up" },
	{ FCH_EVT_LINKDOWN,		"link_down" },
	{ FCH_EVT_LIPRESET,		"lip_reset" },
	{ FCH_EVT_RSCN,			"rscn" },
	{ FCH_EVT_ADAPTER_CHANGE,	"adapter_chg" },
	{ FCH_EVT_PORT_UNKNOWN,		"port_unknown" },
	{ FCH_EVT_PORT_ONLINE,		"port_online" },
	{ FCH_EVT_PORT_OFFLINE,		"port_offline" },
	{ FCH_EVT_PORT_FABRIC,		"port_fabric" },
	{ FCH_EVT_LINK_UNKNOWN,		"link_unknown" },
	{ FCH_EVT_VENDOR_UNIQUE,	"vendor_unique" },
};
fc_enum_name_search(host_event_code, fc_host_event_code,
		fc_host_event_code_names)
#define FC_HOST_EVENT_CODE_MAX_NAMELEN	30


Linus Torvalds's avatar
Linus Torvalds committed
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
/* Convert fc_port_state values to ascii string name */
static struct {
	enum fc_port_state	value;
	char			*name;
} fc_port_state_names[] = {
	{ FC_PORTSTATE_UNKNOWN,		"Unknown" },
	{ FC_PORTSTATE_NOTPRESENT,	"Not Present" },
	{ FC_PORTSTATE_ONLINE,		"Online" },
	{ FC_PORTSTATE_OFFLINE,		"Offline" },
	{ FC_PORTSTATE_BLOCKED,		"Blocked" },
	{ FC_PORTSTATE_BYPASSED,	"Bypassed" },
	{ FC_PORTSTATE_DIAGNOSTICS,	"Diagnostics" },
	{ FC_PORTSTATE_LINKDOWN,	"Linkdown" },
	{ FC_PORTSTATE_ERROR,		"Error" },
	{ FC_PORTSTATE_LOOPBACK,	"Loopback" },
153
	{ FC_PORTSTATE_DELETED,		"Deleted" },
Linus Torvalds's avatar
Linus Torvalds committed
154 155 156 157 158
};
fc_enum_name_search(port_state, fc_port_state, fc_port_state_names)
#define FC_PORTSTATE_MAX_NAMELEN	20


159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
/* Convert fc_vport_state values to ascii string name */
static struct {
	enum fc_vport_state	value;
	char			*name;
} fc_vport_state_names[] = {
	{ FC_VPORT_UNKNOWN,		"Unknown" },
	{ FC_VPORT_ACTIVE,		"Active" },
	{ FC_VPORT_DISABLED,		"Disabled" },
	{ FC_VPORT_LINKDOWN,		"Linkdown" },
	{ FC_VPORT_INITIALIZING,	"Initializing" },
	{ FC_VPORT_NO_FABRIC_SUPP,	"No Fabric Support" },
	{ FC_VPORT_NO_FABRIC_RSCS,	"No Fabric Resources" },
	{ FC_VPORT_FABRIC_LOGOUT,	"Fabric Logout" },
	{ FC_VPORT_FABRIC_REJ_WWN,	"Fabric Rejected WWN" },
	{ FC_VPORT_FAILED,		"VPort Failed" },
};
fc_enum_name_search(vport_state, fc_vport_state, fc_vport_state_names)
#define FC_VPORTSTATE_MAX_NAMELEN	24

/* Reuse fc_vport_state enum function for vport_last_state */
#define get_fc_vport_last_state_name get_fc_vport_state_name


Linus Torvalds's avatar
Linus Torvalds committed
182
/* Convert fc_tgtid_binding_type values to ascii string name */
183
static const struct {
Linus Torvalds's avatar
Linus Torvalds committed
184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
	enum fc_tgtid_binding_type	value;
	char				*name;
	int				matchlen;
} fc_tgtid_binding_type_names[] = {
	{ FC_TGTID_BIND_NONE, "none", 4 },
	{ FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 },
	{ FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 },
	{ FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 },
};
fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type,
		fc_tgtid_binding_type_names)
fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type,
		fc_tgtid_binding_type_names)
#define FC_BINDTYPE_MAX_NAMELEN	30


#define fc_bitfield_name_search(title, table)			\
static ssize_t							\
get_fc_##title##_names(u32 table_key, char *buf)		\
{								\
	char *prefix = "";					\
	ssize_t len = 0;					\
	int i;							\
								\
208
	for (i = 0; i < ARRAY_SIZE(table); i++) {		\
Linus Torvalds's avatar
Linus Torvalds committed
209 210 211 212 213 214 215 216 217 218 219 220
		if (table[i].value & table_key) {		\
			len += sprintf(buf + len, "%s%s",	\
				prefix, table[i].name);		\
			prefix = ", ";				\
		}						\
	}							\
	len += sprintf(buf + len, "\n");			\
	return len;						\
}


/* Convert FC_COS bit values to ascii string name */
221
static const struct {
Linus Torvalds's avatar
Linus Torvalds committed
222 223 224 225 226 227 228 229 230 231 232 233 234
	u32 			value;
	char			*name;
} fc_cos_names[] = {
	{ FC_COS_CLASS1,	"Class 1" },
	{ FC_COS_CLASS2,	"Class 2" },
	{ FC_COS_CLASS3,	"Class 3" },
	{ FC_COS_CLASS4,	"Class 4" },
	{ FC_COS_CLASS6,	"Class 6" },
};
fc_bitfield_name_search(cos, fc_cos_names)


/* Convert FC_PORTSPEED bit values to ascii string name */
235
static const struct {
Linus Torvalds's avatar
Linus Torvalds committed
236 237 238 239 240 241 242
	u32 			value;
	char			*name;
} fc_port_speed_names[] = {
	{ FC_PORTSPEED_1GBIT,		"1 Gbit" },
	{ FC_PORTSPEED_2GBIT,		"2 Gbit" },
	{ FC_PORTSPEED_4GBIT,		"4 Gbit" },
	{ FC_PORTSPEED_10GBIT,		"10 Gbit" },
243 244
	{ FC_PORTSPEED_8GBIT,		"8 Gbit" },
	{ FC_PORTSPEED_16GBIT,		"16 Gbit" },
Linus Torvalds's avatar
Linus Torvalds committed
245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261
	{ FC_PORTSPEED_NOT_NEGOTIATED,	"Not Negotiated" },
};
fc_bitfield_name_search(port_speed, fc_port_speed_names)


static int
show_fc_fc4s (char *buf, u8 *fc4_list)
{
	int i, len=0;

	for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++)
		len += sprintf(buf + len , "0x%02x ", *fc4_list);
	len += sprintf(buf + len, "\n");
	return len;
}


262
/* Convert FC_PORT_ROLE bit values to ascii string name */
263
static const struct {
Linus Torvalds's avatar
Linus Torvalds committed
264 265
	u32 			value;
	char			*name;
266 267 268 269
} fc_port_role_names[] = {
	{ FC_PORT_ROLE_FCP_TARGET,	"FCP Target" },
	{ FC_PORT_ROLE_FCP_INITIATOR,	"FCP Initiator" },
	{ FC_PORT_ROLE_IP_PORT,		"IP Port" },
Linus Torvalds's avatar
Linus Torvalds committed
270
};
271
fc_bitfield_name_search(port_roles, fc_port_role_names)
Linus Torvalds's avatar
Linus Torvalds committed
272 273 274 275 276 277 278 279 280 281 282 283 284

/*
 * Define roles that are specific to port_id. Values are relative to ROLE_MASK.
 */
#define FC_WELLKNOWN_PORTID_MASK	0xfffff0
#define FC_WELLKNOWN_ROLE_MASK  	0x00000f
#define FC_FPORT_PORTID			0x00000e
#define FC_FABCTLR_PORTID		0x00000d
#define FC_DIRSRVR_PORTID		0x00000c
#define FC_TIMESRVR_PORTID		0x00000b
#define FC_MGMTSRVR_PORTID		0x00000a


285 286 287
static void fc_timeout_deleted_rport(struct work_struct *work);
static void fc_timeout_fail_rport_io(struct work_struct *work);
static void fc_scsi_scan_rport(struct work_struct *work);
Linus Torvalds's avatar
Linus Torvalds committed
288 289 290 291 292 293

/*
 * Attribute counts pre object type...
 * Increase these values if you add attributes
 */
#define FC_STARGET_NUM_ATTRS 	3
294
#define FC_RPORT_NUM_ATTRS	10
295
#define FC_VPORT_NUM_ATTRS	9
296
#define FC_HOST_NUM_ATTRS	22
Linus Torvalds's avatar
Linus Torvalds committed
297 298 299 300 301 302 303 304 305 306 307 308 309 310 311

struct fc_internal {
	struct scsi_transport_template t;
	struct fc_function_template *f;

	/*
	 * For attributes : each object has :
	 *   An array of the actual attributes structures
	 *   An array of null-terminated pointers to the attribute
	 *     structures - used for mid-layer interaction.
	 *
	 * The attribute containers for the starget and host are are
	 * part of the midlayer. As the remote port is specific to the
	 * fc transport, we must provide the attribute container.
	 */
312
	struct device_attribute private_starget_attrs[
Linus Torvalds's avatar
Linus Torvalds committed
313
							FC_STARGET_NUM_ATTRS];
314
	struct device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1];
Linus Torvalds's avatar
Linus Torvalds committed
315

316 317
	struct device_attribute private_host_attrs[FC_HOST_NUM_ATTRS];
	struct device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1];
Linus Torvalds's avatar
Linus Torvalds committed
318 319

	struct transport_container rport_attr_cont;
320 321
	struct device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS];
	struct device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1];
322 323

	struct transport_container vport_attr_cont;
324 325
	struct device_attribute private_vport_attrs[FC_VPORT_NUM_ATTRS];
	struct device_attribute *vport_attrs[FC_VPORT_NUM_ATTRS + 1];
Linus Torvalds's avatar
Linus Torvalds committed
326 327 328 329
};

#define to_fc_internal(tmpl)	container_of(tmpl, struct fc_internal, t)

330
static int fc_target_setup(struct transport_container *tc, struct device *dev,
331
			   struct device *cdev)
Linus Torvalds's avatar
Linus Torvalds committed
332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
{
	struct scsi_target *starget = to_scsi_target(dev);
	struct fc_rport *rport = starget_to_rport(starget);

	/*
	 * if parent is remote port, use values from remote port.
	 * Otherwise, this host uses the fc_transport, but not the
	 * remote port interface. As such, initialize to known non-values.
	 */
	if (rport) {
		fc_starget_node_name(starget) = rport->node_name;
		fc_starget_port_name(starget) = rport->port_name;
		fc_starget_port_id(starget) = rport->port_id;
	} else {
		fc_starget_node_name(starget) = -1;
		fc_starget_port_name(starget) = -1;
		fc_starget_port_id(starget) = -1;
	}

	return 0;
}

static DECLARE_TRANSPORT_CLASS(fc_transport_class,
			       "fc_transport",
			       fc_target_setup,
			       NULL,
			       NULL);

360
static int fc_host_setup(struct transport_container *tc, struct device *dev,
361
			 struct device *cdev)
Linus Torvalds's avatar
Linus Torvalds committed
362 363
{
	struct Scsi_Host *shost = dev_to_shost(dev);
364
	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);
Linus Torvalds's avatar
Linus Torvalds committed
365

366
	/*
Linus Torvalds's avatar
Linus Torvalds committed
367 368 369 370
	 * Set default values easily detected by the midlayer as
	 * failure cases.  The scsi lldd is responsible for initializing
	 * all transport attributes to valid values per host.
	 */
371 372 373 374 375 376 377 378
	fc_host->node_name = -1;
	fc_host->port_name = -1;
	fc_host->permanent_port_name = -1;
	fc_host->supported_classes = FC_COS_UNSPECIFIED;
	memset(fc_host->supported_fc4s, 0,
		sizeof(fc_host->supported_fc4s));
	fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN;
	fc_host->maxframe_size = -1;
379
	fc_host->max_npiv_vports = 0;
380 381 382 383 384 385 386 387 388 389
	memset(fc_host->serial_number, 0,
		sizeof(fc_host->serial_number));

	fc_host->port_id = -1;
	fc_host->port_type = FC_PORTTYPE_UNKNOWN;
	fc_host->port_state = FC_PORTSTATE_UNKNOWN;
	memset(fc_host->active_fc4s, 0,
		sizeof(fc_host->active_fc4s));
	fc_host->speed = FC_PORTSPEED_UNKNOWN;
	fc_host->fabric_name = -1;
390 391
	memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name));
	memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname));
392 393 394 395 396

	fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN;

	INIT_LIST_HEAD(&fc_host->rports);
	INIT_LIST_HEAD(&fc_host->rport_bindings);
397
	INIT_LIST_HEAD(&fc_host->vports);
398 399
	fc_host->next_rport_number = 0;
	fc_host->next_target_id = 0;
400 401
	fc_host->next_vport_number = 0;
	fc_host->npiv_vports_inuse = 0;
402

403 404
	snprintf(fc_host->work_q_name, sizeof(fc_host->work_q_name),
		 "fc_wq_%d", shost->host_no);
405 406 407 408 409
	fc_host->work_q = create_singlethread_workqueue(
					fc_host->work_q_name);
	if (!fc_host->work_q)
		return -ENOMEM;

410 411 412
	snprintf(fc_host->devloss_work_q_name,
		 sizeof(fc_host->devloss_work_q_name),
		 "fc_dl_%d", shost->host_no);
413 414 415 416 417 418 419 420
	fc_host->devloss_work_q = create_singlethread_workqueue(
					fc_host->devloss_work_q_name);
	if (!fc_host->devloss_work_q) {
		destroy_workqueue(fc_host->work_q);
		fc_host->work_q = NULL;
		return -ENOMEM;
	}

James Smart's avatar
James Smart committed
421 422 423 424 425 426 427 428 429 430 431 432 433
	fc_bsg_hostadd(shost, fc_host);
	/* ignore any bsg add error - we just can't do sgio */

	return 0;
}

static int fc_host_remove(struct transport_container *tc, struct device *dev,
			 struct device *cdev)
{
	struct Scsi_Host *shost = dev_to_shost(dev);
	struct fc_host_attrs *fc_host = shost_to_fc_host(shost);

	fc_bsg_remove(fc_host->rqst_q);
Linus Torvalds's avatar
Linus Torvalds committed
434 435 436 437 438 439
	return 0;
}

static DECLARE_TRANSPORT_CLASS(fc_host_class,
			       "fc_host",
			       fc_host_setup,
James Smart's avatar
James Smart committed
440
			       fc_host_remove,
Linus Torvalds's avatar
Linus Torvalds committed
441 442 443 444 445 446 447 448 449 450 451 452
			       NULL);

/*
 * Setup and Remove actions for remote ports are handled
 * in the service functions below.
 */
static DECLARE_TRANSPORT_CLASS(fc_rport_class,
			       "fc_remote_ports",
			       NULL,
			       NULL,
			       NULL);

453 454 455 456 457 458 459 460 461 462
/*
 * Setup and Remove actions for virtual ports are handled
 * in the service functions below.
 */
static DECLARE_TRANSPORT_CLASS(fc_vport_class,
			       "fc_vports",
			       NULL,
			       NULL,
			       NULL);

Linus Torvalds's avatar
Linus Torvalds committed
463 464 465 466 467 468 469 470 471
/*
 * Module Parameters
 */

/*
 * dev_loss_tmo: the default number of seconds that the FC transport
 *   should insulate the loss of a remote port.
 *   The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
 */
472
static unsigned int fc_dev_loss_tmo = 60;		/* seconds */
Linus Torvalds's avatar
Linus Torvalds committed
473

474
module_param_named(dev_loss_tmo, fc_dev_loss_tmo, uint, S_IRUGO|S_IWUSR);
Linus Torvalds's avatar
Linus Torvalds committed
475 476 477 478
MODULE_PARM_DESC(dev_loss_tmo,
		 "Maximum number of seconds that the FC transport should"
		 " insulate the loss of a remote port. Once this value is"
		 " exceeded, the scsi target is removed. Value should be"
479 480
		 " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT if"
		 " fast_io_fail_tmo is not set.");
Linus Torvalds's avatar
Linus Torvalds committed
481

482
/*
483
 * Netlink Infrastructure
484
 */
485 486 487 488 489 490 491

static atomic_t fc_event_seq;

/**
 * fc_get_event_number - Obtain the next sequential FC event number
 *
 * Notes:
492
 *   We could have inlined this, but it would have required fc_event_seq to
493 494
 *   be exposed. For now, live with the subroutine call.
 *   Atomic used to avoid lock/unlock...
495
 */
496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512
u32
fc_get_event_number(void)
{
	return atomic_add_return(1, &fc_event_seq);
}
EXPORT_SYMBOL(fc_get_event_number);


/**
 * fc_host_post_event - called to post an even on an fc_host.
 * @shost:		host the event occurred on
 * @event_number:	fc event number obtained from get_fc_event_number()
 * @event_code:		fc_host event being posted
 * @event_data:		32bits of data for the event being posted
 *
 * Notes:
 *	This routine assumes no locks are held on entry.
513
 */
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556
void
fc_host_post_event(struct Scsi_Host *shost, u32 event_number,
		enum fc_host_event_code event_code, u32 event_data)
{
	struct sk_buff *skb;
	struct nlmsghdr	*nlh;
	struct fc_nl_event *event;
	const char *name;
	u32 len, skblen;
	int err;

	if (!scsi_nl_sock) {
		err = -ENOENT;
		goto send_fail;
	}

	len = FC_NL_MSGALIGN(sizeof(*event));
	skblen = NLMSG_SPACE(len);

	skb = alloc_skb(skblen, GFP_KERNEL);
	if (!skb) {
		err = -ENOBUFS;
		goto send_fail;
	}

	nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
				skblen - sizeof(*nlh), 0);
	if (!nlh) {
		err = -ENOBUFS;
		goto send_fail_skb;
	}
	event = NLMSG_DATA(nlh);

	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
				FC_NL_ASYNC_EVENT, len);
	event->seconds = get_seconds();
	event->vendor_id = 0;
	event->host_no = shost->host_no;
	event->event_datalen = sizeof(u32);	/* bytes */
	event->event_num = event_number;
	event->event_code = event_code;
	event->event_data = event_data;

557 558
	nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
			GFP_KERNEL);
559 560 561 562 563 564 565 566
	return;

send_fail_skb:
	kfree_skb(skb);
send_fail:
	name = get_fc_host_event_code_name(event_code);
	printk(KERN_WARNING
		"%s: Dropped Event : host %d %s data 0x%08x - err %d\n",
567
		__func__, shost->host_no,
568 569 570 571 572 573 574
		(name) ? name : "<unknown>", event_data, err);
	return;
}
EXPORT_SYMBOL(fc_host_post_event);


/**
575
 * fc_host_post_vendor_event - called to post a vendor unique event on an fc_host
576 577 578 579
 * @shost:		host the event occurred on
 * @event_number:	fc event number obtained from get_fc_event_number()
 * @data_len:		amount, in bytes, of vendor unique data
 * @data_buf:		pointer to vendor unique data
580
 * @vendor_id:          Vendor id
581 582 583
 *
 * Notes:
 *	This routine assumes no locks are held on entry.
584
 */
585 586
void
fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number,
587
		u32 data_len, char * data_buf, u64 vendor_id)
588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626
{
	struct sk_buff *skb;
	struct nlmsghdr	*nlh;
	struct fc_nl_event *event;
	u32 len, skblen;
	int err;

	if (!scsi_nl_sock) {
		err = -ENOENT;
		goto send_vendor_fail;
	}

	len = FC_NL_MSGALIGN(sizeof(*event) + data_len);
	skblen = NLMSG_SPACE(len);

	skb = alloc_skb(skblen, GFP_KERNEL);
	if (!skb) {
		err = -ENOBUFS;
		goto send_vendor_fail;
	}

	nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG,
				skblen - sizeof(*nlh), 0);
	if (!nlh) {
		err = -ENOBUFS;
		goto send_vendor_fail_skb;
	}
	event = NLMSG_DATA(nlh);

	INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC,
				FC_NL_ASYNC_EVENT, len);
	event->seconds = get_seconds();
	event->vendor_id = vendor_id;
	event->host_no = shost->host_no;
	event->event_datalen = data_len;	/* bytes */
	event->event_num = event_number;
	event->event_code = FCH_EVT_VENDOR_UNIQUE;
	memcpy(&event->event_data, data_buf, data_len);

627 628
	nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS,
			GFP_KERNEL);
629 630 631 632 633 634 635
	return;

send_vendor_fail_skb:
	kfree_skb(skb);
send_vendor_fail:
	printk(KERN_WARNING
		"%s: Dropped Event : host %d vendor_unique - err %d\n",
636
		__func__, shost->host_no, err);
637 638 639 640 641
	return;
}
EXPORT_SYMBOL(fc_host_post_vendor_event);


Linus Torvalds's avatar
Linus Torvalds committed
642 643 644

static __init int fc_transport_init(void)
{
645 646 647 648 649
	int error;

	atomic_set(&fc_event_seq, 0);

	error = transport_class_register(&fc_host_class);
650 651 652
	if (error)
		return error;
	error = transport_class_register(&fc_vport_class);
Linus Torvalds's avatar
Linus Torvalds committed
653
	if (error)
654
		goto unreg_host_class;
Linus Torvalds's avatar
Linus Torvalds committed
655 656
	error = transport_class_register(&fc_rport_class);
	if (error)
657 658 659 660 661 662 663 664 665 666 667 668 669
		goto unreg_vport_class;
	error = transport_class_register(&fc_transport_class);
	if (error)
		goto unreg_rport_class;
	return 0;

unreg_rport_class:
	transport_class_unregister(&fc_rport_class);
unreg_vport_class:
	transport_class_unregister(&fc_vport_class);
unreg_host_class:
	transport_class_unregister(&fc_host_class);
	return error;
Linus Torvalds's avatar
Linus Torvalds committed
670 671 672 673 674 675 676
}

static void __exit fc_transport_exit(void)
{
	transport_class_unregister(&fc_transport_class);
	transport_class_unregister(&fc_rport_class);
	transport_class_unregister(&fc_host_class);
677
	transport_class_unregister(&fc_vport_class);
Linus Torvalds's avatar
Linus Torvalds committed
678 679 680 681 682 683 684 685
}

/*
 * FC Remote Port Attribute Management
 */

#define fc_rport_show_function(field, format_string, sz, cast)		\
static ssize_t								\
686 687
show_fc_rport_##field (struct device *dev, 				\
		       struct device_attribute *attr, char *buf)	\
Linus Torvalds's avatar
Linus Torvalds committed
688
{									\
689
	struct fc_rport *rport = transport_class_to_rport(dev);		\
Linus Torvalds's avatar
Linus Torvalds committed
690 691
	struct Scsi_Host *shost = rport_to_shost(rport);		\
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
692 693
	if ((i->f->get_rport_##field) &&				\
	    !((rport->port_state == FC_PORTSTATE_BLOCKED) ||		\
694
	      (rport->port_state == FC_PORTSTATE_DELETED) ||		\
695
	      (rport->port_state == FC_PORTSTATE_NOTPRESENT)))		\
Linus Torvalds's avatar
Linus Torvalds committed
696 697 698 699 700 701
		i->f->get_rport_##field(rport);				\
	return snprintf(buf, sz, format_string, cast rport->field); 	\
}

#define fc_rport_store_function(field)					\
static ssize_t								\
702 703 704
store_fc_rport_##field(struct device *dev,				\
		       struct device_attribute *attr,			\
		       const char *buf,	size_t count)			\
Linus Torvalds's avatar
Linus Torvalds committed
705 706
{									\
	int val;							\
707
	struct fc_rport *rport = transport_class_to_rport(dev);		\
Linus Torvalds's avatar
Linus Torvalds committed
708 709
	struct Scsi_Host *shost = rport_to_shost(rport);		\
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
710
	char *cp;							\
711
	if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||		\
712
	    (rport->port_state == FC_PORTSTATE_DELETED) ||		\
713 714
	    (rport->port_state == FC_PORTSTATE_NOTPRESENT))		\
		return -EBUSY;						\
715 716 717
	val = simple_strtoul(buf, &cp, 0);				\
	if (*cp && (*cp != '\n'))					\
		return -EINVAL;						\
Linus Torvalds's avatar
Linus Torvalds committed
718 719 720 721 722 723
	i->f->set_rport_##field(rport, val);				\
	return count;							\
}

#define fc_rport_rd_attr(field, format_string, sz)			\
	fc_rport_show_function(field, format_string, sz, )		\
724
static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
725 726 727 728
			 show_fc_rport_##field, NULL)

#define fc_rport_rd_attr_cast(field, format_string, sz, cast)		\
	fc_rport_show_function(field, format_string, sz, (cast))	\
729
static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
730 731 732 733 734
			  show_fc_rport_##field, NULL)

#define fc_rport_rw_attr(field, format_string, sz)			\
	fc_rport_show_function(field, format_string, sz, )		\
	fc_rport_store_function(field)					\
735
static FC_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR,		\
Linus Torvalds's avatar
Linus Torvalds committed
736 737 738 739 740 741
			show_fc_rport_##field,				\
			store_fc_rport_##field)


#define fc_private_rport_show_function(field, format_string, sz, cast)	\
static ssize_t								\
742 743
show_fc_rport_##field (struct device *dev, 				\
		       struct device_attribute *attr, char *buf)	\
Linus Torvalds's avatar
Linus Torvalds committed
744
{									\
745
	struct fc_rport *rport = transport_class_to_rport(dev);		\
Linus Torvalds's avatar
Linus Torvalds committed
746 747 748 749 750
	return snprintf(buf, sz, format_string, cast rport->field); 	\
}

#define fc_private_rport_rd_attr(field, format_string, sz)		\
	fc_private_rport_show_function(field, format_string, sz, )	\
751
static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
752 753 754 755
			 show_fc_rport_##field, NULL)

#define fc_private_rport_rd_attr_cast(field, format_string, sz, cast)	\
	fc_private_rport_show_function(field, format_string, sz, (cast)) \
756
static FC_DEVICE_ATTR(rport, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
757 758 759 760 761
			  show_fc_rport_##field, NULL)


#define fc_private_rport_rd_enum_attr(title, maxlen)			\
static ssize_t								\
762 763
show_fc_rport_##title (struct device *dev,				\
		       struct device_attribute *attr, char *buf)	\
Linus Torvalds's avatar
Linus Torvalds committed
764
{									\
765
	struct fc_rport *rport = transport_class_to_rport(dev);		\
Linus Torvalds's avatar
Linus Torvalds committed
766 767 768 769 770 771
	const char *name;						\
	name = get_fc_##title##_name(rport->title);			\
	if (!name)							\
		return -EINVAL;						\
	return snprintf(buf, maxlen, "%s\n", name);			\
}									\
772
static FC_DEVICE_ATTR(rport, title, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
773 774 775 776
			show_fc_rport_##title, NULL)


#define SETUP_RPORT_ATTRIBUTE_RD(field)					\
777
	i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds's avatar
Linus Torvalds committed
778 779 780 781 782 783 784
	i->private_rport_attrs[count].attr.mode = S_IRUGO;		\
	i->private_rport_attrs[count].store = NULL;			\
	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
	if (i->f->show_rport_##field)					\
		count++

#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field)				\
785
	i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds's avatar
Linus Torvalds committed
786 787 788 789 790 791
	i->private_rport_attrs[count].attr.mode = S_IRUGO;		\
	i->private_rport_attrs[count].store = NULL;			\
	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
	count++

#define SETUP_RPORT_ATTRIBUTE_RW(field)					\
792
	i->private_rport_attrs[count] = device_attr_rport_##field; \
Linus Torvalds's avatar
Linus Torvalds committed
793 794 795 796 797 798 799 800
	if (!i->f->set_rport_##field) {					\
		i->private_rport_attrs[count].attr.mode = S_IRUGO;	\
		i->private_rport_attrs[count].store = NULL;		\
	}								\
	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
	if (i->f->show_rport_##field)					\
		count++

801 802
#define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field)				\
{									\
803
	i->private_rport_attrs[count] = device_attr_rport_##field; \
804 805 806 807
	i->rport_attrs[count] = &i->private_rport_attrs[count];		\
	count++;							\
}

Linus Torvalds's avatar
Linus Torvalds committed
808 809 810 811 812 813 814 815

/* The FC Transport Remote Port Attributes: */

/* Fixed Remote Port Attributes */

fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20);

static ssize_t
816 817
show_fc_rport_supported_classes (struct device *dev,
				 struct device_attribute *attr, char *buf)
Linus Torvalds's avatar
Linus Torvalds committed
818
{
819
	struct fc_rport *rport = transport_class_to_rport(dev);
Linus Torvalds's avatar
Linus Torvalds committed
820 821 822 823
	if (rport->supported_classes == FC_COS_UNSPECIFIED)
		return snprintf(buf, 20, "unspecified\n");
	return get_fc_cos_names(rport->supported_classes, buf);
}
824
static FC_DEVICE_ATTR(rport, supported_classes, S_IRUGO,
Linus Torvalds's avatar
Linus Torvalds committed
825 826 827 828
		show_fc_rport_supported_classes, NULL);

/* Dynamic Remote Port Attributes */

829 830 831 832 833
/*
 * dev_loss_tmo attribute
 */
fc_rport_show_function(dev_loss_tmo, "%d\n", 20, )
static ssize_t
834 835
store_fc_rport_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
			    const char *buf, size_t count)
836
{
837
	unsigned long val;
838
	struct fc_rport *rport = transport_class_to_rport(dev);
839 840
	struct Scsi_Host *shost = rport_to_shost(rport);
	struct fc_internal *i = to_fc_internal(shost->transportt);
841
	char *cp;
842
	if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
843
	    (rport->port_state == FC_PORTSTATE_DELETED) ||
844 845
	    (rport->port_state == FC_PORTSTATE_NOTPRESENT))
		return -EBUSY;
846
	val = simple_strtoul(buf, &cp, 0);
847
	if ((*cp && (*cp != '\n')) || (val < 0))
848
		return -EINVAL;
849

850 851 852 853 854 855
	/*
	 * Check for overflow; dev_loss_tmo is u32
	 */
	if (val > UINT_MAX)
		return -EINVAL;

856 857 858 859 860 861 862 863
	/*
	 * If fast_io_fail is off we have to cap
	 * dev_loss_tmo at SCSI_DEVICE_BLOCK_MAX_TIMEOUT
	 */
	if (rport->fast_io_fail_tmo == -1 &&
	    val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)
		return -EINVAL;

864 865 866
	i->f->set_rport_dev_loss_tmo(rport, val);
	return count;
}
867
static FC_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR,
868
		show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo);
Linus Torvalds's avatar
Linus Torvalds committed
869 870 871 872 873 874 875 876 877


/* Private Remote Port Attributes */

fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
fc_private_rport_rd_attr(port_id, "0x%06x\n", 20);

static ssize_t
878 879
show_fc_rport_roles (struct device *dev, struct device_attribute *attr,
		     char *buf)
Linus Torvalds's avatar
Linus Torvalds committed
880
{
881
	struct fc_rport *rport = transport_class_to_rport(dev);
Linus Torvalds's avatar
Linus Torvalds committed
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901

	/* identify any roles that are port_id specific */
	if ((rport->port_id != -1) &&
	    (rport->port_id & FC_WELLKNOWN_PORTID_MASK) ==
					FC_WELLKNOWN_PORTID_MASK) {
		switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) {
		case FC_FPORT_PORTID:
			return snprintf(buf, 30, "Fabric Port\n");
		case FC_FABCTLR_PORTID:
			return snprintf(buf, 30, "Fabric Controller\n");
		case FC_DIRSRVR_PORTID:
			return snprintf(buf, 30, "Directory Server\n");
		case FC_TIMESRVR_PORTID:
			return snprintf(buf, 30, "Time Server\n");
		case FC_MGMTSRVR_PORTID:
			return snprintf(buf, 30, "Management Server\n");
		default:
			return snprintf(buf, 30, "Unknown Fabric Entity\n");
		}
	} else {
902
		if (rport->roles == FC_PORT_ROLE_UNKNOWN)
Linus Torvalds's avatar
Linus Torvalds committed
903
			return snprintf(buf, 20, "unknown\n");
904
		return get_fc_port_roles_names(rport->roles, buf);
Linus Torvalds's avatar
Linus Torvalds committed
905 906
	}
}
907
static FC_DEVICE_ATTR(rport, roles, S_IRUGO,
Linus Torvalds's avatar
Linus Torvalds committed
908 909 910 911 912
		show_fc_rport_roles, NULL);

fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN);
fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20);

913 914 915 916
/*
 * fast_io_fail_tmo attribute
 */
static ssize_t
917 918
show_fc_rport_fast_io_fail_tmo (struct device *dev,
				struct device_attribute *attr, char *buf)
919
{
920
	struct fc_rport *rport = transport_class_to_rport(dev);
921 922 923 924 925 926 927

	if (rport->fast_io_fail_tmo == -1)
		return snprintf(buf, 5, "off\n");
	return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo);
}

static ssize_t
928 929 930
store_fc_rport_fast_io_fail_tmo(struct device *dev,
				struct device_attribute *attr, const char *buf,
				size_t count)
931 932 933
{
	int val;
	char *cp;
934
	struct fc_rport *rport = transport_class_to_rport(dev);
935 936 937 938 939 940 941 942 943

	if ((rport->port_state == FC_PORTSTATE_BLOCKED) ||
	    (rport->port_state == FC_PORTSTATE_DELETED) ||
	    (rport->port_state == FC_PORTSTATE_NOTPRESENT))
		return -EBUSY;
	if (strncmp(buf, "off", 3) == 0)
		rport->fast_io_fail_tmo = -1;
	else {
		val = simple_strtoul(buf, &cp, 0);
944 945 946 947 948 949 950 951
		if ((*cp && (*cp != '\n')) || (val < 0))
			return -EINVAL;
		/*
		 * Cap fast_io_fail by dev_loss_tmo or
		 * SCSI_DEVICE_BLOCK_MAX_TIMEOUT.
		 */
		if ((val >= rport->dev_loss_tmo) ||
		    (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT))
952
			return -EINVAL;
953

954 955 956 957
		rport->fast_io_fail_tmo = val;
	}
	return count;
}
958
static FC_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR,
959
	show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo);
Linus Torvalds's avatar
Linus Torvalds committed
960 961 962 963 964 965 966 967


/*
 * FC SCSI Target Attribute Management
 */

/*
 * Note: in the target show function we recognize when the remote
968
 *  port is in the hierarchy and do not allow the driver to get
Linus Torvalds's avatar
Linus Torvalds committed
969 970 971 972 973
 *  involved in sysfs functions. The driver only gets involved if
 *  it's the "old" style that doesn't use rports.
 */
#define fc_starget_show_function(field, format_string, sz, cast)	\
static ssize_t								\
974 975
show_fc_starget_##field (struct device *dev, 				\
			 struct device_attribute *attr, char *buf)	\
Linus Torvalds's avatar
Linus Torvalds committed
976
{									\
977
	struct scsi_target *starget = transport_class_to_starget(dev);	\
Linus Torvalds's avatar
Linus Torvalds committed
978 979 980 981 982 983 984 985 986 987 988 989 990
	struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);	\
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	struct fc_rport *rport = starget_to_rport(starget);		\
	if (rport)							\
		fc_starget_##field(starget) = rport->field;		\
	else if (i->f->get_starget_##field)				\
		i->f->get_starget_##field(starget);			\
	return snprintf(buf, sz, format_string, 			\
		cast fc_starget_##field(starget)); 			\
}

#define fc_starget_rd_attr(field, format_string, sz)			\
	fc_starget_show_function(field, format_string, sz, )		\
991
static FC_DEVICE_ATTR(starget, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
992 993 994 995
			 show_fc_starget_##field, NULL)

#define fc_starget_rd_attr_cast(field, format_string, sz, cast)		\
	fc_starget_show_function(field, format_string, sz, (cast))	\
996
static FC_DEVICE_ATTR(starget, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
997 998 999
			  show_fc_starget_##field, NULL)

#define SETUP_STARGET_ATTRIBUTE_RD(field)				\
1000
	i->private_starget_attrs[count] = device_attr_starget_##field; \
Linus Torvalds's avatar
Linus Torvalds committed
1001 1002 1003 1004 1005 1006 1007
	i->private_starget_attrs[count].attr.mode = S_IRUGO;		\
	i->private_starget_attrs[count].store = NULL;			\
	i->starget_attrs[count] = &i->private_starget_attrs[count];	\
	if (i->f->show_starget_##field)					\
		count++

#define SETUP_STARGET_ATTRIBUTE_RW(field)				\
1008
	i->private_starget_attrs[count] = device_attr_starget_##field; \
Linus Torvalds's avatar
Linus Torvalds committed
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
	if (!i->f->set_starget_##field) {				\
		i->private_starget_attrs[count].attr.mode = S_IRUGO;	\
		i->private_starget_attrs[count].store = NULL;		\
	}								\
	i->starget_attrs[count] = &i->private_starget_attrs[count];	\
	if (i->f->show_starget_##field)					\
		count++

/* The FC Transport SCSI Target Attributes: */
fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);
fc_starget_rd_attr(port_id, "0x%06x\n", 20);


1023 1024 1025 1026 1027 1028
/*
 * FC Virtual Port Attribute Management
 */

#define fc_vport_show_function(field, format_string, sz, cast)		\
static ssize_t								\
1029 1030
show_fc_vport_##field (struct device *dev, 				\
		       struct device_attribute *attr, char *buf)	\
1031
{									\
1032
	struct fc_vport *vport = transport_class_to_vport(dev);		\
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
	struct Scsi_Host *shost = vport_to_shost(vport);		\
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	if ((i->f->get_vport_##field) &&				\
	    !(vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)))	\
		i->f->get_vport_##field(vport);				\
	return snprintf(buf, sz, format_string, cast vport->field); 	\
}

#define fc_vport_store_function(field)					\
static ssize_t								\
1043 1044 1045
store_fc_vport_##field(struct device *dev,				\
		       struct device_attribute *attr,			\
		       const char *buf,	size_t count)			\
1046 1047
{									\
	int val;							\
1048
	struct fc_vport *vport = transport_class_to_vport(dev);		\
1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
	struct Scsi_Host *shost = vport_to_shost(vport);		\
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	char *cp;							\
	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))	\
		return -EBUSY;						\
	val = simple_strtoul(buf, &cp, 0);				\
	if (*cp && (*cp != '\n'))					\
		return -EINVAL;						\
	i->f->set_vport_##field(vport, val);				\
	return count;							\
}

#define fc_vport_store_str_function(field, slen)			\
static ssize_t								\
1063 1064 1065
store_fc_vport_##field(struct device *dev,				\
		       struct device_attribute *attr, 			\
		       const char *buf,	size_t count)			\
1066
{									\
1067
	struct fc_vport *vport = transport_class_to_vport(dev);		\
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083
	struct Scsi_Host *shost = vport_to_shost(vport);		\
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	unsigned int cnt=count;						\
									\
	/* count may include a LF at end of string */			\
	if (buf[cnt-1] == '\n')						\
		cnt--;							\
	if (cnt > ((slen) - 1))						\
		return -EINVAL;						\
	memcpy(vport->field, buf, cnt);					\
	i->f->set_vport_##field(vport);					\
	return count;							\
}

#define fc_vport_rd_attr(field, format_string, sz)			\
	fc_vport_show_function(field, format_string, sz, )		\
1084
static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
1085 1086 1087 1088
			 show_fc_vport_##field, NULL)

#define fc_vport_rd_attr_cast(field, format_string, sz, cast)		\
	fc_vport_show_function(field, format_string, sz, (cast))	\
1089
static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
1090 1091 1092 1093 1094
			  show_fc_vport_##field, NULL)

#define fc_vport_rw_attr(field, format_string, sz)			\
	fc_vport_show_function(field, format_string, sz, )		\
	fc_vport_store_function(field)					\
1095
static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,		\
1096 1097 1098 1099 1100
			show_fc_vport_##field,				\
			store_fc_vport_##field)

#define fc_private_vport_show_function(field, format_string, sz, cast)	\
static ssize_t								\
1101 1102
show_fc_vport_##field (struct device *dev,				\
		       struct device_attribute *attr, char *buf)	\
1103
{									\
1104
	struct fc_vport *vport = transport_class_to_vport(dev);		\
1105 1106 1107 1108 1109
	return snprintf(buf, sz, format_string, cast vport->field); 	\
}

#define fc_private_vport_store_u32_function(field)			\
static ssize_t								\
1110 1111 1112
store_fc_vport_##field(struct device *dev,				\
		       struct device_attribute *attr,			\
		       const char *buf,	size_t count)			\
1113 1114
{									\
	u32 val;							\
1115
	struct fc_vport *vport = transport_class_to_vport(dev);		\
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128
	char *cp;							\
	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))		\
		return -EBUSY;						\
	val = simple_strtoul(buf, &cp, 0);				\
	if (*cp && (*cp != '\n'))					\
		return -EINVAL;						\
	vport->field = val;						\
	return count;							\
}


#define fc_private_vport_rd_attr(field, format_string, sz)		\
	fc_private_vport_show_function(field, format_string, sz, )	\
1129
static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
1130 1131 1132 1133
			 show_fc_vport_##field, NULL)

#define fc_private_vport_rd_attr_cast(field, format_string, sz, cast)	\
	fc_private_vport_show_function(field, format_string, sz, (cast)) \
1134
static FC_DEVICE_ATTR(vport, field, S_IRUGO,			\
1135 1136 1137 1138 1139
			  show_fc_vport_##field, NULL)

#define fc_private_vport_rw_u32_attr(field, format_string, sz)		\
	fc_private_vport_show_function(field, format_string, sz, )	\
	fc_private_vport_store_u32_function(field)			\
1140
static FC_DEVICE_ATTR(vport, field, S_IRUGO | S_IWUSR,		\
1141 1142 1143 1144 1145 1146
			show_fc_vport_##field,				\
			store_fc_vport_##field)


#define fc_private_vport_rd_enum_attr(title, maxlen)			\
static ssize_t								\
1147 1148 1149
show_fc_vport_##title (struct device *dev,				\
		       struct device_attribute *attr,			\
		       char *buf)					\
1150
{									\
1151
	struct fc_vport *vport = transport_class_to_vport(dev);		\
1152 1153 1154 1155 1156 1157
	const char *name;						\
	name = get_fc_##title##_name(vport->title);			\
	if (!name)							\
		return -EINVAL;						\
	return snprintf(buf, maxlen, "%s\n", name);			\
}									\
1158
static FC_DEVICE_ATTR(vport, title, S_IRUGO,			\
1159 1160 1161 1162
			show_fc_vport_##title, NULL)


#define SETUP_VPORT_ATTRIBUTE_RD(field)					\
1163
	i->private_vport_attrs[count] = device_attr_vport_##field; \
1164 1165 1166 1167 1168 1169 1170 1171
	i->private_vport_attrs[count].attr.mode = S_IRUGO;		\
	i->private_vport_attrs[count].store = NULL;			\
	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
	if (i->f->get_##field)						\
		count++
	/* NOTE: Above MACRO differs: checks function not show bit */

#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(field)				\
1172
	i->private_vport_attrs[count] = device_attr_vport_##field; \
1173 1174 1175 1176 1177 1178
	i->private_vport_attrs[count].attr.mode = S_IRUGO;		\
	i->private_vport_attrs[count].store = NULL;			\
	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
	count++

#define SETUP_VPORT_ATTRIBUTE_WR(field)					\
1179
	i->private_vport_attrs[count] = device_attr_vport_##field; \
1180 1181 1182 1183 1184 1185
	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
	if (i->f->field)						\
		count++
	/* NOTE: Above MACRO differs: checks function */

#define SETUP_VPORT_ATTRIBUTE_RW(field)					\
1186
	i->private_vport_attrs[count] = device_attr_vport_##field; \
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
	if (!i->f->set_vport_##field) {					\
		i->private_vport_attrs[count].attr.mode = S_IRUGO;	\
		i->private_vport_attrs[count].store = NULL;		\
	}								\
	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
	count++
	/* NOTE: Above MACRO differs: does not check show bit */

#define SETUP_PRIVATE_VPORT_ATTRIBUTE_RW(field)				\
{									\
1197
	i->private_vport_attrs[count] = device_attr_vport_##field; \
1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216
	i->vport_attrs[count] = &i->private_vport_attrs[count];		\
	count++;							\
}


/* The FC Transport Virtual Port Attributes: */

/* Fixed Virtual Port Attributes */

/* Dynamic Virtual Port Attributes */

/* Private Virtual Port Attributes */

fc_private_vport_rd_enum_attr(vport_state, FC_VPORTSTATE_MAX_NAMELEN);
fc_private_vport_rd_enum_attr(vport_last_state, FC_VPORTSTATE_MAX_NAMELEN);
fc_private_vport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long);
fc_private_vport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long);

static ssize_t
1217 1218
show_fc_vport_roles (struct device *dev, struct device_attribute *attr,
		     char *buf)
1219
{
1220
	struct fc_vport *vport = transport_class_to_vport(dev);
1221 1222 1223 1224 1225

	if (vport->roles == FC_PORT_ROLE_UNKNOWN)
		return snprintf(buf, 20, "unknown\n");
	return get_fc_port_roles_names(vport->roles, buf);
}
1226
static FC_DEVICE_ATTR(vport, roles, S_IRUGO, show_fc_vport_roles, NULL);
1227 1228 1229 1230 1231 1232

fc_private_vport_rd_enum_attr(vport_type, FC_PORTTYPE_MAX_NAMELEN);

fc_private_vport_show_function(symbolic_name, "%s\n",
		FC_VPORT_SYMBOLIC_NAMELEN + 1, )
fc_vport_store_str_function(symbolic_name, FC_VPORT_SYMBOLIC_NAMELEN)
1233
static FC_DEVICE_ATTR(vport, symbolic_name, S_IRUGO | S_IWUSR,
1234 1235 1236
		show_fc_vport_symbolic_name, store_fc_vport_symbolic_name);

static ssize_t
1237 1238
store_fc_vport_delete(struct device *dev, struct device_attribute *attr,
		      const char *buf, size_t count)
1239
{
1240
	struct fc_vport *vport = transport_class_to_vport(dev);
1241
	struct Scsi_Host *shost = vport_to_shost(vport);
1242 1243 1244 1245 1246 1247 1248 1249 1250
	unsigned long flags;

	spin_lock_irqsave(shost->host_lock, flags);
	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
		spin_unlock_irqrestore(shost->host_lock, flags);
		return -EBUSY;
	}
	vport->flags |= FC_VPORT_DELETING;
	spin_unlock_irqrestore(shost->host_lock, flags);
1251

1252
	fc_queue_work(shost, &vport->vport_delete_work);
1253 1254
	return count;
}
1255
static FC_DEVICE_ATTR(vport, vport_delete, S_IWUSR,
1256 1257 1258 1259 1260 1261 1262 1263
			NULL, store_fc_vport_delete);


/*
 * Enable/Disable vport
 *  Write "1" to disable, write "0" to enable
 */
static ssize_t
1264 1265
store_fc_vport_disable(struct device *dev, struct device_attribute *attr,
		       const char *buf,
1266 1267
			   size_t count)
{
1268
	struct fc_vport *vport = transport_class_to_vport(dev);
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
	struct Scsi_Host *shost = vport_to_shost(vport);
	struct fc_internal *i = to_fc_internal(shost->transportt);
	int stat;

	if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING))
		return -EBUSY;

	if (*buf == '0') {
		if (vport->vport_state != FC_VPORT_DISABLED)
			return -EALREADY;
	} else if (*buf == '1') {
		if (vport->vport_state == FC_VPORT_DISABLED)
			return -EALREADY;
	} else
		return -EINVAL;

	stat = i->f->vport_disable(vport, ((*buf == '0') ? false : true));
	return stat ? stat : count;
}
1288
static FC_DEVICE_ATTR(vport, vport_disable, S_IWUSR,
1289 1290 1291
			NULL, store_fc_vport_disable);


Linus Torvalds's avatar
Linus Torvalds committed
1292 1293 1294 1295 1296 1297
/*
 * Host Attribute Management
 */

#define fc_host_show_function(field, format_string, sz, cast)		\
static ssize_t								\
1298 1299
show_fc_host_##field (struct device *dev,				\
		      struct device_attribute *attr, char *buf)		\
Linus Torvalds's avatar
Linus Torvalds committed
1300
{									\
1301
	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
Linus Torvalds's avatar
Linus Torvalds committed
1302 1303 1304 1305 1306 1307 1308 1309
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	if (i->f->get_host_##field)					\
		i->f->get_host_##field(shost);				\
	return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
}

#define fc_host_store_function(field)					\
static ssize_t								\
1310 1311 1312
store_fc_host_##field(struct device *dev, 				\
		      struct device_attribute *attr,			\
		      const char *buf,	size_t count)			\
Linus Torvalds's avatar
Linus Torvalds committed
1313 1314
{									\
	int val;							\
1315
	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
Linus Torvalds's avatar
Linus Torvalds committed
1316
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
1317
	char *cp;							\
Linus Torvalds's avatar
Linus Torvalds committed
1318
									\
1319 1320 1321
	val = simple_strtoul(buf, &cp, 0);				\
	if (*cp && (*cp != '\n'))					\
		return -EINVAL;						\
Linus Torvalds's avatar
Linus Torvalds committed
1322 1323 1324 1325
	i->f->set_host_##field(shost, val);				\
	return count;							\
}

1326 1327
#define fc_host_store_str_function(field, slen)				\
static ssize_t								\
1328 1329 1330
store_fc_host_##field(struct device *dev,				\
		      struct device_attribute *attr,			\
		      const char *buf, size_t count)			\
1331
{									\
1332
	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	unsigned int cnt=count;						\
									\
	/* count may include a LF at end of string */			\
	if (buf[cnt-1] == '\n')						\
		cnt--;							\
	if (cnt > ((slen) - 1))						\
		return -EINVAL;						\
	memcpy(fc_host_##field(shost), buf, cnt);			\
	i->f->set_host_##field(shost);					\
	return count;							\
}

Linus Torvalds's avatar
Linus Torvalds committed
1346 1347
#define fc_host_rd_attr(field, format_string, sz)			\
	fc_host_show_function(field, format_string, sz, )		\
1348
static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
1349 1350 1351 1352
			 show_fc_host_##field, NULL)

#define fc_host_rd_attr_cast(field, format_string, sz, cast)		\
	fc_host_show_function(field, format_string, sz, (cast))		\
1353
static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
1354 1355 1356 1357 1358
			  show_fc_host_##field, NULL)

#define fc_host_rw_attr(field, format_string, sz)			\
	fc_host_show_function(field, format_string, sz, )		\
	fc_host_store_function(field)					\
1359
static FC_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR,		\
Linus Torvalds's avatar
Linus Torvalds committed
1360 1361 1362 1363 1364
			show_fc_host_##field,				\
			store_fc_host_##field)

#define fc_host_rd_enum_attr(title, maxlen)				\
static ssize_t								\
1365 1366
show_fc_host_##title (struct device *dev,				\
		      struct device_attribute *attr, char *buf)		\
Linus Torvalds's avatar
Linus Torvalds committed
1367
{									\
1368
	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
Linus Torvalds's avatar
Linus Torvalds committed
1369 1370 1371 1372 1373 1374 1375 1376 1377
	struct fc_internal *i = to_fc_internal(shost->transportt);	\
	const char *name;						\
	if (i->f->get_host_##title)					\
		i->f->get_host_##title(shost);				\
	name = get_fc_##title##_name(fc_host_##title(shost));		\
	if (!name)							\
		return -EINVAL;						\
	return snprintf(buf, maxlen, "%s\n", name);			\
}									\
1378
static FC_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL)
Linus Torvalds's avatar
Linus Torvalds committed
1379 1380

#define SETUP_HOST_ATTRIBUTE_RD(field)					\
1381
	i->private_host_attrs[count] = device_attr_host_##field;	\
Linus Torvalds's avatar
Linus Torvalds committed
1382 1383 1384 1385 1386 1387
	i->private_host_attrs[count].attr.mode = S_IRUGO;		\
	i->private_host_attrs[count].store = NULL;			\
	i->host_attrs[count] = &i->private_host_attrs[count];		\
	if (i->f->show_host_##field)					\
		count++

1388
#define SETUP_HOST_ATTRIBUTE_RD_NS(field)				\
1389
	i->private_host_attrs[count] = device_attr_host_##field;	\
1390 1391 1392 1393 1394
	i->private_host_attrs[count].attr.mode = S_IRUGO;		\
	i->private_host_attrs[count].store = NULL;			\
	i->host_attrs[count] = &i->private_host_attrs[count];		\
	count++

Linus Torvalds's avatar
Linus Torvalds committed
1395
#define SETUP_HOST_ATTRIBUTE_RW(field)					\
1396
	i->private_host_attrs[count] = device_attr_host_##field;	\
Linus Torvalds's avatar
Linus Torvalds committed
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
	if (!i->f->set_host_##field) {					\
		i->private_host_attrs[count].attr.mode = S_IRUGO;	\
		i->private_host_attrs[count].store = NULL;		\
	}								\
	i->host_attrs[count] = &i->private_host_attrs[count];		\
	if (i->f->show_host_##field)					\
		count++


#define fc_private_host_show_function(field, format_string, sz, cast)	\
static ssize_t								\
1408 1409
show_fc_host_##field (struct device *dev,				\
		      struct device_attribute *attr, char *buf)		\
Linus Torvalds's avatar
Linus Torvalds committed
1410
{									\
1411
	struct Scsi_Host *shost = transport_class_to_shost(dev);	\
Linus Torvalds's avatar
Linus Torvalds committed
1412 1413 1414 1415 1416
	return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \
}

#define fc_private_host_rd_attr(field, format_string, sz)		\
	fc_private_host_show_function(field, format_string, sz, )	\
1417
static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
1418 1419 1420 1421
			 show_fc_host_##field, NULL)

#define fc_private_host_rd_attr_cast(field, format_string, sz, cast)	\
	fc_private_host_show_function(field, format_string, sz, (cast)) \
1422
static FC_DEVICE_ATTR(host, field, S_IRUGO,			\
Linus Torvalds's avatar
Linus Torvalds committed
1423 1424 1425
			  show_fc_host_##field, NULL)

#define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field)			\
1426
	i->private_host_attrs[count] = device_attr_host_##field;	\
Linus Torvalds's avatar
Linus Torvalds committed
1427 1428 1429 1430 1431 1432
	i->private_host_attrs[count].attr.mode = S_IRUGO;		\
	i->private_host_attrs[count].store = NULL;			\
	i->host_attrs[count] = &i->private_host_attrs[count];		\
	count++

#define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field)			\
1433
{									\
1434
	i->private_host_attrs[count] = device_attr_host_##field;	\
Linus Torvalds's avatar
Linus Torvalds committed
1435
	i->host_attrs[count] = &i->private_host_attrs[count];		\
1436 1437
	count++;							\
}
Linus Torvalds's avatar
Linus Torvalds committed
1438 1439 1440 1441 1442


/* Fixed Host Attributes */

static ssize_t
1443 1444
show_fc_host_supported_classes (struct device *dev,
			        struct device_attribute *attr, char *buf)
Linus Torvalds's avatar
Linus Torvalds committed
1445
{
1446
	struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds's avatar
Linus Torvalds committed
1447 1448 1449 1450 1451 1452

	if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED)
		return snprintf(buf, 20, "unspecified\n");

	return get_fc_cos_names(fc_host_supported_classes(shost), buf);
}
1453
static FC_DEVICE_ATTR(host, supported_classes, S_IRUGO,
Linus Torvalds's avatar
Linus Torvalds committed
1454 1455 1456
		show_fc_host_supported_classes, NULL);

static ssize_t
1457 1458
show_fc_host_supported_fc4s (struct device *dev,
			     struct device_attribute *attr, char *buf)
Linus Torvalds's avatar
Linus Torvalds committed
1459
{
1460
	struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds's avatar
Linus Torvalds committed
1461 1462
	return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost));
}
1463
static FC_DEVICE_ATTR(host, supported_fc4s, S_IRUGO,
Linus Torvalds's avatar
Linus Torvalds committed
1464 1465 1466
		show_fc_host_supported_fc4s, NULL);

static ssize_t
1467 1468
show_fc_host_supported_speeds (struct device *dev,
			       struct device_attribute *attr, char *buf)
Linus Torvalds's avatar
Linus Torvalds committed
1469
{
1470
	struct Scsi_Host *shost = transport_class_to_shost(dev);
Linus Torvalds's avatar
Linus Torvalds committed
1471 1472 1473 1474 1475 1476

	if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN)
		return snprintf(buf, 20, "unknown\n");

	return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf);
}
1477
static FC_DEVICE_ATTR(host, supported_speeds, S_IRUGO,
Linus Torvalds's avatar